The crime picture is very serious now. Try to stay away from tourists areas - Sosua, BC, Cabarete, Bavaro, Santo Domingo. In campo there is less crime. Do not get too close with Dominicans so that they would visit your home. You NEVER KNOW who is your current visitor and what he has in mind.
Yes, don't talk to tourists, don't talk to Dominicans, you never know.
Don't talk to your wife, she might be cheating you.
Don't talk to your dog, he might bite you.
Be careful, my friend, and have a nice time.
Barnabe